Investment Securities - Additional Information (Detail)	Mar. 31, 2024 USD ($) Securities	Dec. 31, 2023 USD ($) Securities	Mar. 31, 2023 Securities
Investments Debt And Equity Securities [Line Items]
Number of available for sale securities in unrealized loss positions	0		0
Allowance for credit losses required for held to maturity securities \| $	$ 75,000	$ 55,000
Securities Investment [Member]
Investments Debt And Equity Securities [Line Items]
Number of available for sale securities in unrealized loss positions	51	55

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant